# -*- coding: utf-8 -*-
f = open("teste.txt", "w")
s= "treta"
for k in range(10): f.write(s); f.write("\n")
f.close()
f = open("teste.txt", "r")
f.seek(5)
print f.tell()
x= f.read(10)
print x
c= 0
for line in f:
	print "{0}: ".format(c), line
	c += 1
f.close()
with open ("teste.txt", "r") as f:
	x = f.readline()
	if x == 'treta\n': print "voila"
